I know what it means. to blacklist can mean to deny someone work in a particular field, A DNR is a list of names that cannot return to work. Texas labor law states 52.031. BLACKLISTING OFFENSE; PENALTY. (a) In this section, "blacklist" means to place on a book or list or publish the name of an employee of an individual, firm, company, or corporation who was discharged or who voluntarily left that employment, intending to prevent the employee from engaging in or securing employment of any kind with any other person, in either a public or a private capacity. (b) A person commits an offense if the person: (1) blacklists or causes to be blacklisted an employee; or DNR list is a list of names of employees that cannot return FOR SOME REASON.